Residents of ‘Boom Time’ Suburbs Face Unsustainable Commutes

Apr 23, 2014

People living in the
‘boom time’ suburbs of Dublin are more likely to endure unsustainable commutes
to work than those living in older accommodation. Research shows that people
living in newly constructed housing in the Greater Dublin Area (GDA) are more
likely to depend on cars to ‘get from A to B’ and that their journey times are
also longer.

Many
of the new housing developments in the GDA are not linked to Dublin city centre
by rail networks, and new public transport infrastructure has generally lagged
behind construction. However, even within the same electoral districts or
geographical areas, those living in housing built after 2001 are more likely to
drive than those living in houses in that area built before 2001.

In the
five-year period from 2001-2006, 17% of housing in the GDA was constructed,
with a further 10% added by 2011. Much of this new housing is at a higher
density to the older, more traditional Dublin suburbs, and comprises apartments
and duplexes. Due to the breakdown of the property market and construction
industry in Ireland there is now a large stock of unfinished and unoccupied
housing in the GDA.

Among
the most interesting results, which used Census data in their analyses, was
that a higher proportion of commuters living in newly constructed housing drove
alone to work (68% of people living in post-2006 housing, compared to 56%
living in pre-1970 housing). Also, only 19% of people in the former category
walked or cycled to CBD employment, compared to the more environmentally
friendly figure of 30% in the latter category.

Dr Brian Caulfield, Assistant Professor in Civil Engineering at Trinity College Dublin,
and lead author of the journal article featuring the research, said: “These
results show that another negative impact of the housing boom is that those
individuals living in newer housing stock, due to lack of transport
alternatives, have more unsustainable travel patterns.”

Dr Caulfield hopes the results might prove useful in shaping future
research and in developing potential transport solutions, while underlining the
importance of monitoring change and responding to it on short time scales. He
added: “These
results also show how important it is to collect Census data and how vital it
is for providing us with a picture of how the city we live in is always
changing.”

The results, when examining CBD work trips, also show that people living
in houses built before 1970 are the least likely to have commutes of over 20
minutes (55%, compared to 71% of all of those living in housing built after
2006).

Co-author of the research, Dr Aoife Ahern, from University College Dublin’s
School of Civil, Structural and Environmental Engineering, added: “As the
economy improves and traffic returns to pre-recession levels, those living in
these ‘boom time’ houses will only suffer longer journey times, thus exacerbating
existing problems.”

This research has recently been published in the journal Case Studies on Transport Policy. It
forms part of a larger project, which is ongoing and is funded by the TCD/UCD
Innovation Alliance. A copy of the journal article is available here.

For media queries contact:

Thomas Deane, Press Officer for
the Faculty of Engineering, Mathematics and Science, Trinity College Dublin at deaneth@tcd.ie or Tel: +353 1 896 4685